Feed mechanism for riveting-machines.



No. 650,578. Patented May 29, I900. w. P. BARTEL.

FEED MECHANISM FEB RIVETING MACHINES.

(Application filed July 28,1899.)

' 3 SheetsSheet I.

(No Model.)

m: Nonms PETERS co" PHUTO-LH'NQ, WASHINGTON n. c.

No. 650,578. Patented May 29, I900. w. P. BARTEL.

51-250 MECHANISM FOR Rl-VETINGMAGHINES. (No Mo el.) (Application filed .m 2a, 1899.)

3 SheetsSheet 2 No. 650,578. Patented May 29, I900.

- W. P. BARTEL.

FEED MECHANISM FOR RIVETING MACHINES.

' (Application filed .m 25, 1899.) (N o M o (1 el 3 Sheets-Sheet 3.

STATES \VILLIAM P. 'BARTEL, OF \V ALTI-IAM, MASSACHUSETTS.

FEED MECHANISM FOR RlVETlNG-MACHlNES.

SPECIFICATION forming-part of Letters Patent 110,650,578, dated May 29, 1900.

' Application filed July 28, 1899. Serial No. 725,392- (NomodelJ To all whom it may concern: 7

Be it known that I, WILLIAM P. BARTEL, of W'altharn, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Riveting- Machines, of which the following is a specification. I

This invention relates to riveting-machines of the character shown in Letters Patent of the United States No. 519,782, dated May 15, 1894, such machine being designed to feed pronged or bifurcated rivets and comprising a rivet-receiver which holds the rivets one at a time in the path of the driver or plunger and over the anvil which cooperates with the driver in clenching the rivets, a chute or guide which conveys the rivets to the receiver and has a cut-off device for causing the admission of the rivets to the receiver one at a time, and a hopper for feeding the loose rivets into the guide in a predetermined position.

The invention has for its object to adapt a machine organized, as shown in said patent, to feed and operate on pronged rivets made of sheet metal; and to this end the invention consists in the improvements which I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a side elevation of a riveting-machine provided with my improvements, a portion of the hopper being shown in section, taken on the line 1 1 of Fig. 2. Fig. 2 represents a section on line 2 2 of Fig. 1. Fig. 3 represents an end viewof the rotary section of the hopper. Fig. 4: represents a section on line 4 4. of Fig. 1. Fig. 5 represents a top view of the hopper.

The same letters and numerals of reference indicate the same parts in all the figures.

In the drawings, a represents the head or frame of the machine, the same comprising the overhanging arm 2, supporting the rivet feeding and driving mechanism,and the lower arm 3, supporting the anvil b. I

0 represents the rivet-receiver, which receives the rivets one at a time from the guide or chute (Z, said receiver being reciprocated vertically between the lower end of the guide and the anvil.

6 represents the verticallyreciprocating driver, which cooperates with the anvil inclenching the rivets supplied to the receiver 0. The chute or guide has a cut' ofi device f,

which causes the admission of the rivets to the receiver 0 one at a time.

It represents the rotary section of the rivethopper, the same comprising an end piece 4, secured to a shaft 5, and a circular flange 6, formed on said end piece and having a'thickened marginal portion 7, in which are formed slots 8, dividing said marginal portion into narrow blades or arms 9,'each adapted to be bestridden by a pronged rivet and to guide the same outwardly from the interior of the rotary section h into the curved upper portion cl of the guided.

h represents the fixed section of the hopper, which has a bearing 12 for the shaft 5, and a segmental lip or flange-13, which overlaps a portion of the margin of the rotary section and is in close proximity thereto, said lip preventing the escape of the rivets from the blades or arms 9 until they are brought by the rotation of the section 71 to the curved portion d of the guide. The fixed section h is formed at its upper portion as a'spout 7L2 to facilitate the pouring of the loose rivets into the hopper.

The movable parts of the machine-namely, the rotary hopper-section h, the cut-off device f, the rivet-receiver c, and the driver 6-- operate conjointly in the manner described in the above-mentioned Patent No. 519,782, and the mechanism employed to operatesaid parts is or may be substantially the same as described in said patent. I do not therefore deem it necessary to describe said mechanism My present improvements are confined to or blades 9 are arranged at an angle to the radii of the rotary section, as shown in Figs. 1 and 3, the said slots and blades being so disposed as that each blade when it reaches the lower end of the curved portion d of the chute cl stands in an approximately-vertical position, so that the light sheet-metal rivet or rivets that bestride it will gravitatemuch more quickly and certainly into the said curved portion (1' than would be the case if the slots and wings or blades were radially arranged, as shown in the patent. Therivets are therefore discharged with precision into the curved portion 61, the two prongs of each rivet striking the outer edge of thecurved 'portion 01' simultaneously and moving one above the other into the main portion d of the chute. The width of the chute d and of the curved portion d is slightly'in excess of the width of the rivet-prongs and is not such as-to permit the rotation of the rivets in'the chute.

Consequently the rivets are" caused to movewith one prong in advance of theother through the chute and into the receiver. The rivets are thus-presented to the work so-that their pron gsare always turned in the same direction. Sheet-metal rivet-s, which are the articles especially intended to be fed by this mechanism, are much lighter than the type of rivet used with the machine disclosed inthe patent above referred to, and hence they require more of a downward inclination to cause them toleave the wings or blades than do the rivets in-said patent. Consequently the arrangement of the wings possesses not only the advantage of serving to better feed sheet-metal rivets, but they also, as above stated, permit the rivets to leave the rotary section only with one prong above the other, which is the position desired for their downward movement from the chute in order that they will descend without binding laterally.

Secondly. The rotary hopper-section h is mounted yieldingly on the shaft 5 and is pressed by a cup-spring 8 against a shoulder on the shaft, the pressure of said spring is such that the frictional contact between the section It and the'shoulder 5O insures the rotation of the section it with the shaft when the conditions are normal.

guiding wings or blades which are at an angle to the radii of the-rotary section, and means whereby the rivets are-permitted to leave said section only with one prong above the other, substantiallya's and for-"the purpose specified. 2. In a riveting machine, the combination of ahopperhaving'afixedsection, anda chambered circular section adapted to rotate on a horizontal axis, combined with a chute or guide havinga curved upper'portion one-side of which is formed by the periphery of the said rotary section, the margin of said sec- .tion being'subdivid'ed by slots formed at an- ;angle to the radii of said section into a series f of rivet-guidingwings or blades which are arranged to cause the rivets to gravitate with certainty into the curved portion of the guide with one prong of each rivet above-the other, as set forth.

In testimony whereof I have affixed my signature in presenceof two witnesses- WILLIAM P; BAR/TEL. WVitnesses O. F. BROWN, R. M. PIERSON. 

